| 电流舵D/A转换器的随机误差建模 |
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| 引用本文： | 罗彦,王向展,于奇,沈路.电流舵D/A转换器的随机误差建模[J].微电子学,2009,39(1). |
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| 作者姓名： | 罗彦 王向展 于奇 沈路 |
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| 作者单位： | 电子科技大学电子薄膜与集成器件国家重点实验室,成都,610054 |
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| 摘 要： | 电流源的失配是制约电流舵D/A转换器精度的一个重要因素.它是一个随机现象,需要用统计的观点进行分析.两个晶体管之间的失配,既与晶体管尺寸有关,又与晶体管之间的距离有关.以往的分析中,只考虑了尺寸相关项,而忽略了距离相关项.文章分析了基于距离相关项的随机误差,推导出每个数码的INL表达式,并用Matlab对不同开关序列下D/A转换器的成品率进行仿真,得出用SG算法优化开关序列,可大大减小距离相关项的影响.
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| 关 键 词： | 电流舵D/A转换器 随机误差 距离相关项 积分误差 开关序列 |
Modeling of Random Error in Current-Steering D/A Converter |
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| LUO Yan,WANG Xiangzhan,YU Qi,SHEN Lu.Modeling of Random Error in Current-Steering D/A Converter[J].Microelectronics,2009,39(1). |
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| Authors: | LUO Yan WANG Xiangzhan YU Qi SHEN Lu |
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| Institution: | State Key Laboratory of Electronic Thin Films and Integrated Devices;University of Electronic Science and Technology of China;Chengdu 610054;P.R.China |
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| Abstract: | The mismatch of two identical MOS transistors attributes to both the dimensions of MOSFETs and the distance between them.Previous works were done only based on the size-dependent term,with the distance term neglected.In this work,random error related to the distance term was analyzed,and the expression of INL for each code was calculated.The yields of DAC for different switching sequences were simulated with Matlab.It has been shown that the effect of distance term could be greatly reduced for SG arithmetic... |
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| Keywords: | Current-steering D/A converter Random error Distance term INL Switching sequence |
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